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#include <windows.h>
#include <stdlib.h>
#include <mmsystem.h>
#include <mmreg.h>
#include "com_sun_javafx_audio_windows_waveout_Mixer.h"
static HANDLE event = NULL;
static HWAVEOUT output = NULL;
// We use only two buffers to keep latency down
#define NUM_BUFFERS 2
//#define NUM_BUFFERS 4
// This is about 20 ms of data for WAVE_FORMAT_PCM:
// (44100 samples / sec) * (20 ms / 1000 ms) * (2 bytes / sample) * (2 channels)
//#define BUFFER_SIZE 3528
// This is about 50 ms of data for WAVE_FORMAT_PCM:
// (44100 samples / sec) * (50 ms / 1000 ms) * (2 bytes / sample) * (1 channel)
//#define BUFFER_SIZE 4410
// This is about 200 ms of data for WAVE_FORMAT_PCM:
// (44100 samples / sec) * (200 ms / 1000 ms) * (2 bytes / sample) * (1 channel)
//#define BUFFER_SIZE 17640
// This is about 200 ms of data for WAVE_FORMAT_PCM:
// (44100 samples / sec) * (200 ms / 1000 ms) * (2 bytes / sample) * (2 channel)
//#define BUFFER_SIZE 35280
// This is about 1000 ms of data for WAVE_FORMAT_PCM:
// (44100 samples / sec) * (1000 ms / 1000 ms) * (2 bytes / sample) * (1 channel)
//#define BUFFER_SIZE 88200
// This is about 50 ms of data for WAVE_FORMAT_PCM:
// (44100 samples / sec) * (50 ms / 1000 ms) * (2 bytes / sample) * (2 channels)
//#define BUFFER_SIZE 8820
// This is about 50 ms of data for WAVE_FORMAT_IEEE_FLOAT:
// (44100 samples / sec) * (50 ms / 1000 ms) * (4 bytes / sample) * (2 channels)
//#define BUFFER_SIZE 17640
// This is about 200 ms of data for WAVE_FORMAT_PCM:
// (11025 samples / sec) * (200 ms / 1000 ms) * (2 bytes / sample) * (2 channel)
#define BUFFER_SIZE 8820
//#define BUFFER_SIZE 8192
static WAVEHDR** buffers = NULL;
void CALLBACK playbackCallback(HWAVEOUT output,
UINT msg,
DWORD_PTR userData,
DWORD_PTR param1,
DWORD_PTR param2)
{
if (msg == WOM_DONE) {
WAVEHDR* hdr = (WAVEHDR*) param1;
hdr->dwFlags |= WHDR_DONE;
SetEvent(event);
}
}
JNIEXPORT jboolean JNICALL Java_com_sun_javafx_audio_windows_waveout_Mixer_initializeWaveOut
(JNIEnv *env, jclass unused, jlong eventObject)
{
event = (HANDLE) eventObject;
// Note the hard requirements on the RawSoundConverter's output format
WAVEFORMATEX format;
format.wFormatTag = WAVE_FORMAT_PCM;
// format.wFormatTag = WAVE_FORMAT_IEEE_FLOAT;
format.nChannels = 2;
// format.nChannels = 1;
// format.nSamplesPerSec = 44100;
format.nSamplesPerSec = 11025;
format.wBitsPerSample = 16;
// format.wBitsPerSample = 32;
format.nBlockAlign = format.nChannels * format.wBitsPerSample / 8;
format.nAvgBytesPerSec = format.nBlockAlign * format.nSamplesPerSec;
format.cbSize = 0;
MMRESULT res = waveOutOpen(&output,
WAVE_MAPPER,
&format,
/* NULL, */ (DWORD_PTR) &playbackCallback,
NULL, // No user data right now
/* CALLBACK_NULL */ CALLBACK_FUNCTION);
if (res != MMSYSERR_NOERROR) {
return JNI_FALSE;
}
buffers = (WAVEHDR**) calloc(NUM_BUFFERS, sizeof(WAVEHDR));
for (int i = 0; i < NUM_BUFFERS; i++) {
char* data = (char*) calloc(BUFFER_SIZE, 1);
WAVEHDR* hdr = (WAVEHDR*) calloc(1, sizeof(WAVEHDR));
hdr->lpData = data;
hdr->dwBufferLength = BUFFER_SIZE;
hdr->dwFlags |= WHDR_DONE;
buffers[i] = hdr;
}
return JNI_TRUE;
}
JNIEXPORT void JNICALL Java_com_sun_javafx_audio_windows_waveout_Mixer_shutdownWaveOut
(JNIEnv *env, jclass unused)
{
// writeString("Pausing\n");
waveOutPause(output);
// writeString("Resetting\n");
waveOutReset(output);
// writeString("Closing output\n");
waveOutClose(output);
}
JNIEXPORT jlong JNICALL Java_com_sun_javafx_audio_windows_waveout_Mixer_getNextMixerBuffer
(JNIEnv *env, jclass unused)
{
WAVEHDR* hdr = NULL;
for (int i = 0; i < NUM_BUFFERS; i++) {
if (buffers[i] != NULL && ((buffers[i]->dwFlags & WHDR_DONE) != 0)) {
hdr = buffers[i];
hdr->dwFlags &= ~WHDR_DONE;
break;
}
}
return (jlong) hdr;
}
JNIEXPORT jobject JNICALL Java_com_sun_javafx_audio_windows_waveout_Mixer_getMixerBufferData
(JNIEnv *env, jclass unused, jlong mixerBuffer)
{
WAVEHDR* hdr = (WAVEHDR*) mixerBuffer;
return env->NewDirectByteBuffer(hdr->lpData, hdr->dwBufferLength);
}
JNIEXPORT jlong JNICALL Java_com_sun_javafx_audio_windows_waveout_Mixer_getMixerBufferDataAddress
(JNIEnv *env, jclass unused, jlong mixerBuffer)
{
WAVEHDR* hdr = (WAVEHDR*) mixerBuffer;
return (jlong) hdr->lpData;
}
JNIEXPORT jint JNICALL Java_com_sun_javafx_audio_windows_waveout_Mixer_getMixerBufferDataCapacity
(JNIEnv *env, jclass unused, jlong mixerBuffer)
{
WAVEHDR* hdr = (WAVEHDR*) mixerBuffer;
return (jint) hdr->dwBufferLength;
}
JNIEXPORT jboolean JNICALL Java_com_sun_javafx_audio_windows_waveout_Mixer_prepareMixerBuffer
(JNIEnv *env, jclass unused, jlong mixerBuffer)
{
MMRESULT res = waveOutPrepareHeader(output,
(WAVEHDR*) mixerBuffer,
sizeof(WAVEHDR));
if (res == MMSYSERR_NOERROR) {
return JNI_TRUE;
}
return JNI_FALSE;
}
JNIEXPORT jboolean JNICALL Java_com_sun_javafx_audio_windows_waveout_Mixer_writeMixerBuffer
(JNIEnv *env, jclass unused, jlong mixerBuffer)
{
MMRESULT res = waveOutWrite(output,
(WAVEHDR*) mixerBuffer,
sizeof(WAVEHDR));
if (res == MMSYSERR_NOERROR) {
waveOutRestart(output);
return JNI_TRUE;
}
return JNI_FALSE;
}
JNIEXPORT jlong JNICALL Java_com_sun_javafx_audio_windows_waveout_Mixer_CreateEvent
(JNIEnv *env, jclass unused)
{
return (jlong) CreateEvent(NULL, FALSE, TRUE, NULL);
}
JNIEXPORT jboolean JNICALL Java_com_sun_javafx_audio_windows_waveout_Mixer_WaitForSingleObject
(JNIEnv *env, jclass unused, jlong eventObject)
{
DWORD res = WaitForSingleObject((HANDLE) eventObject, INFINITE);
if (res == WAIT_OBJECT_0) {
return JNI_TRUE;
}
return JNI_FALSE;
}
JNIEXPORT void JNICALL Java_com_sun_javafx_audio_windows_waveout_Mixer_SetEvent
(JNIEnv *env, jclass unused, jlong eventObject)
{
SetEvent((HANDLE) eventObject);
}
JNIEXPORT void JNICALL Java_com_sun_javafx_audio_windows_waveout_Mixer_CloseHandle
(JNIEnv *env, jclass unused, jlong eventObject)
{
CloseHandle((HANDLE) eventObject);
}
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